JP4289146B2 - 三次元実装型半導体装置の製造方法 - Google Patents
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Description
このCSP技術を用いて製造された半導体チップは、実装面積が半導体チップの面積と同程度で良いため、高密度実装を図ることができる。
かかる背景の下、例えば特許文献1に開示されているような三次元実装技術が案出されてきた。この三次元実装技術は、同様の機能を有する半導体チップ同士又は異なる機能を有する半導体チップ同士を積層し、各半導体チップ間を配線接続することで、半導体チップの高密度実装を図る技術である。
そこで、電極の剥がれ防止を目的として複数の電極層を絶縁層を介して積層した場合には、これら複数の電極層と絶縁層とに対して貫通孔を形成し、これに接続端子を挿通させる必要がある。しかしながら、そのエッチング工程は複雑で、各層毎にエッチング条件を変える必要が生じ得る。
そして、このような半導体装置を三次元実装させる場合には、基板及び電極層を積層方向に貫通する接続端子用貫通孔を形成するとともに、該接続端子用貫通孔内に導電部材(接続端子)を挿通し、各半導体装置の接続端子を上下に接続する必要がある。
一般的に、積層構造の電極層に対して、上述のように接続端子用の貫通孔を形成し、これに接続端子を挿通するには、各導電層と絶縁層を交互にエッチングする必要があり、その工程に非常に手間が掛かるものとなる。
そこで、本発明では、電極層の最上層の導電層より下層側の導電層に貫通孔を形成し、該貫通孔内にそれぞれ絶縁材料を充填した構成としたため、電極層に接続端子用の貫通孔を形成する際には、絶縁材料が充填された貫通孔内部をエッチングすることで、積層された各電極層自身をエッチングすることなく簡便に接続端子用貫通孔を形成することができるようになる。つまり、基板及び電極層を貫通する接続端子用貫通孔を形成するに際して、予め形成しておいた各導電層の貫通孔を穿孔予定部とし、この導電層貫通孔と同軸に、最上層導電層と絶縁層と絶縁材料からなる層(導電層貫通孔内)をエッチングするのみで良く、各電極層とその間の絶縁層を交互にエッチングする必要がなくなったのである。
以上のように、本発明の半導体装置によると、これら半導体装置を三次元実装化するに際し、その工程を簡略化することができ、ひいてはコスト削減に寄与することができるようになる。
なお、最上層導電層の下方、特に基板穿孔予定部にはいかなる電気配線(例えばCMP(化学的機械研磨)用のダミーパターンなど)も形成しないことが好ましい。この場合、該電気配線に考慮せずとも、電極層に対して貫通孔を形成することが可能となる。
そして、積層型の電極層に予め絶縁部材が充填された貫通孔を形成し、これをエッチングすることで接続端子用の貫通孔を形成するものとしているため、該接続端子用の貫通孔の形成に際して、各導電層及び絶縁層毎に交互にエッチング条件を変更する必要もなく、非常に効率の良く製造することが可能となる。
Claims (1)
- 半導体基板と、前記半導体基板の上に設けられ、複数の導電層がそれぞれ絶縁層を介して積層され、前記複数の導電層が前記絶縁膜に設けられたコンタクトホールを介して電気的に接続されている電極であって、前記電極の最上層の導電層には孔が形成されず、前記電極の前記最上層の導電層より下層側の導電層には前記孔が形成され、前記孔の内側には絶縁材料が充填されている前記電極と、を有する半導体装置を用意する工程と、
前記最上層の導電層に対して前記下層側の導電層の孔と同軸の孔部を形成するとともに、前記孔の内側の前記絶縁材料をエッチングすることで前記電極に第1の貫通孔を形成する工程と、前記半導体基板に対して前記第1の貫通孔と連通する第2の貫通孔を形成する工程と、前記第1の貫通孔の内側及び前記第2の貫通孔の内側に導電部材を充填する工程と、を含む半導体装置形成工程と、
前記半導体装置を複数用い、前記半導体装置の各々を前記導電部材を介して積層する半導体装置積層工程と、
を具備することを特徴とする三次元実装型半導体装置の製造方法。
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JP2003424713A JP4289146B2 (ja) | 2003-03-27 | 2003-12-22 | 三次元実装型半導体装置の製造方法 |
US10/799,621 US7141493B2 (en) | 2003-03-27 | 2004-03-15 | Semiconductor device, method of manufacturing three-dimensional stacking type semiconductor device, circuit board, and electronic instrument |
CNA2004100332075A CN1534771A (zh) | 2003-03-27 | 2004-03-26 | 半导体装置、三维安装型半导体装置的制法、电路板、电子仪器 |
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JP2006303307A (ja) * | 2005-04-22 | 2006-11-02 | Toshiba Corp | 半導体装置およびその製造方法 |
US7429529B2 (en) * | 2005-08-05 | 2008-09-30 | Farnworth Warren M | Methods of forming through-wafer interconnects and structures resulting therefrom |
US7517798B2 (en) | 2005-09-01 | 2009-04-14 | Micron Technology, Inc. | Methods for forming through-wafer interconnects and structures resulting therefrom |
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US10785871B1 (en) * | 2018-12-12 | 2020-09-22 | Vlt, Inc. | Panel molded electronic assemblies with integral terminals |
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JP2018152412A (ja) * | 2017-03-10 | 2018-09-27 | 東芝メモリ株式会社 | 半導体装置及びその製造方法 |
JP6697411B2 (ja) * | 2017-03-29 | 2020-05-20 | キオクシア株式会社 | 半導体装置の製造方法 |
CN112164688B (zh) * | 2017-07-21 | 2023-06-13 | 联华电子股份有限公司 | 芯片堆叠结构及管芯堆叠结构的制造方法 |
US10559520B2 (en) * | 2017-09-29 | 2020-02-11 | Qualcomm Incorporated | Bulk layer transfer processing with backside silicidation |
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US6943056B2 (en) * | 2002-04-16 | 2005-09-13 | Renesas Technology Corp. | Semiconductor device manufacturing method and electronic equipment using same |
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US7141493B2 (en) | 2006-11-28 |
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